Steam-boiler furnace.



N0. 679,98l. Patented Aug. 6, I901. J. 0. MORRIS.

STEAM BOILER FURNACE.

(Application filed Sept. 12, 1900) m) Model.)

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UNITED STATES PATENT OFFICE.

JOHN ODEN MORRIS, OF RICI-IMOND, VIRGINIA, ASSIGNOR TO MORRIS MOORE, OF DANVILLE, VIRGINIA.

STEAM-BOILER FURNACE.

SPECIFICATION formingpart of Letters Patent No. 679,981, dated August 6, 1901.

Application filed September 12, 1900. Serial No. 29,790. No mod m To all whom it may concern:

Be it known that I, JOHN ODEN MORRIS, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented new and useful Improvements in Steam Boiler Furnaces, of which the following is a specification.

My invention relates to steam-boiler furnaces and doors for the same; and its object is to construct a furnace of this character which will be provided with two combustionchambers of novel design combinedwith an improved door. By this combination I am enabled to almost completely consume the products of combustion under any and all conditions. The novel construction by which this object is achieved and the above-stated advantages accomplished is fully described in this specification and claimed, and illustrated in the accompanying drawing, forming a part thereof, in which the figure is a section of the furnace and door taken longitudinally of the boiler.

Like numerals of reference designate like parts in the drawing.

The numeral 1 designates a tubular steamboiler which is incased by masonry and brickwork in the usual manner. Means for heating the boiler 1 is provided in the shape of a furnace, which consists of a fire-box 2 and two combustion-chambers 3 and 4:. The fire-box 2 is divided into two compartments 2 and 2 by a grate 5, upon which the fire is built. Communicating with the lower compartment 2 is a draft-opening 6 to furnish the normal supply of air to the furnace. The upper chamber 2" is also provided with an opening, which is designated by the numeral 7 and is closed by a door 8. The two combustionchambers 3 and 4.- are separated from each other by a bridge-wall 9. The chamber 3 has a straight throat 10 and an enlarged portion 11, having a backwardly and downwardly inclined floor 12. The top of the arch 13 in the bridge-wall is almost in a horizontal line with the bottom of the throat 10. By this construction the flames are compelled to pass down and along the incline 12 in escaping from this chamber. The chamber 4 has a doubly-inclined or roof-shaped floor. The first incline 14 slopes up and the second 15 slopes down and the course of the outdraft thereby first directed up and against a second bridge-wall l6 and then down and under the arch 16 therein, from whence it passes up an incline 17 and through the boiler. By this combination of two combustion-chambers each having inclined floors the smoke or out draft is compelled to change its course twice and the combustion rendered almost perfect. The maximum efliciencyis obtained by making the ridge of the roof-shaped floor of the second combustion-chamber come in the same horizontal plane with the outlet and inlet thereof. In the case of a single chamberit has been found that the retardation of the gases was insufficient to accomplish the object desired.

In operating my furnace under normal conditions the draft in the door 8 is not employed, air only being admitted through the opening 6; but when a forced draft is desired one or both of the drafts in the door are opened more or less, as the occasion may rerequire.

I do not wish to be limited as to details of construction, as these may be modified in many particulars without departing from the spirit of my invention.

Having thus described myinvention, what I claim as new, and wish to secure by Letters Patent, isw 1. In asteam-boiler furnace, a combustionchamber having an inlet and an outlet and a roof-shaped floor, the two inclined planes of which slope toward the outlet and inlet respectively, and the ridge thereof being in the same horizontal plane with the tops of said outlet and inlet, substantially as de scribed.

2. In a steam-boiler furnace, the combination, substantiallyas described, of a first combustion-chamber having an outlet and an inlet and a downwardly-inclined floor sloping toward said outlet, a second combustionchamber communicating with said first chamher by means of the said ontlet thereof, said my hand in presence of two subscribing witsgcondlehanbler haying afrogf-slllianed goor, nesses. teincineanesi eso w 10 see rom the ridge to t he inlet and outlet ther of, the JOHN ODEN said ridge being in the same horizontal plane Witnesses: with the top of said inlet and outlet. FRANK G. RADELFINGER,

In testimony whereof I have hereunto set BENNETT S. JONES. 

